Moving FederatedEmail/SystemMailbox from One Store to Another - Exchange 2010

Question

Just upgraded from Exchange 2003 to 2010. Somehow, I have two mailbox databases on my single Exchange 2010 server. One database contains all of the mailboxes I had moved from the 2003 exchange server; the other contains two SystemMailboxes and one FederatedEmail box.

I am just starting to get a grasp on the commands used in the EMS. I was wondering if someone could point me in the right direction to move these three "system" mailboxes into my actual mailbox database so I can eliminate the second database.

Just trying to sure up this one server before I role out my backup Exchange server. Thanks in advance! Your help and ideas are greatly appreciated as I try to make this setup as simple as possible.

Solution

I'm not at work to verify this, but you can move them the same way you do any other mailbox using EMS as long as you can see them using "-Arbitration". You can check out the page here, but the command is basically this:

Get-Mailbox -Arbitration -Database db1 | New-MoveRequest -TargetDatabase db2

You should probably run just the Get-Mailbox for the database to make sure it only displays the mailboxes you want to move because I can't verify the command at the moment.

Comments

[ThaKidd KG5ORD]

Here is the actual error message if I try to delete the store: Microsoft.Exchange.Management.Tasks.AssociatedUserMailboxExi‌​stException: This mailbox database contains one or more mailboxes or arbitration mailboxes. To get a list of all mailboxes in this database, run the command Get-Mailbox -Database <Database ID>. To get a list of all arbitration mailboxes in this database, run the command Get-Mailbox -Database <Database ID> -Arbitration. Before you can remove this mailbox database, you must disable, move, or remove user mailboxes and move arbitration mailboxes.

[ThaKidd KG5ORD]

Upgraded = Transitioned. I tried "get-mailbox -database "Mailbox Database 0618761717" -arbitration" and got: SystemMailbox{1f05a927... SystemMailbox{1f0... <server> unlimited SystemMailbox{e0dc1c29... SystemMailbox{e0d... <server> unlimited FederatedEmail.4c1f4d8... FederatedEmail.4c... <server> 1 MB The mailbox does not contain any mailboxes if -Arbitration is not used.

[ThaKidd KG5ORD]

Worked exactly as you stated. Thank you very much!